Merge branch 'master'

1 files changed, 2 insertions, 31 deletions

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index d68be61f0a4..fee2aca3f6a 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -941,17 +941,6 @@ static void* mgsl_get_text_ptr(void)
 	return mgsl_get_text_ptr;
 }
 
-/*
- * tmp_buf is used as a temporary buffer by mgsl_write.  We need to
- * lock it in case the COPY_FROM_USER blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ioports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-
 static inline int mgsl_paranoia_check(struct mgsl_struct *info,
 					char *name, const char *routine)
 {
@@ -2150,7 +2139,7 @@ static int mgsl_write(struct tty_struct * tty,
 	if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
 		goto cleanup;
 
-	if (!tty || !info->xmit_buf || !tmp_buf)
+	if (!tty || !info->xmit_buf)
 		goto cleanup;
 
 	if ( info->params.mode == MGSL_MODE_HDLC ||
@@ -3438,7 +3427,6 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
 {
 	struct mgsl_struct	*info;
 	int 			retval, line;
-	unsigned long		page;
 	unsigned long flags;
 
 	/* verify range of specified line number */	
@@ -3472,18 +3460,6 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp)
 		goto cleanup;
 	}
 	
-	if (!tmp_buf) {
-		page = get_zeroed_page(GFP_KERNEL);
-		if (!page) {
-			retval = -ENOMEM;
-			goto cleanup;
-		}
-		if (tmp_buf)
-			free_page(page);
-		else
-			tmp_buf = (unsigned char *) page;
-	}
-	
 	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
 	spin_lock_irqsave(&info->netlock, flags);
@@ -4502,11 +4478,6 @@ static void synclink_cleanup(void)
 		kfree(tmp);
 	}
 	
-	if (tmp_buf) {
-		free_page((unsigned long) tmp_buf);
-		tmp_buf = NULL;
-	}
-	
 	if (pci_registered)
 		pci_unregister_driver(&synclink_pci_driver);
 }
@@ -6025,7 +5996,7 @@ static void usc_set_async_mode( struct mgsl_struct *info )
 	 * <15..8>	?		RxFIFO IRQ Request Level
 	 *
 	 * Note: For async mode the receive FIFO level must be set
-	 * to 0 to aviod the situation where the FIFO contains fewer bytes
+	 * to 0 to avoid the situation where the FIFO contains fewer bytes
 	 * than the trigger level and no more data is expected.
 	 *
 	 * <7>		0		Exited Hunt IA (Interrupt Arm)